Even without a firearm if you rob anyone you go to jail buddy. Also if you or I dumped forever chemicals into public water supply, knowingly doing so, we'd be called terrorists. Probably rightfully so.
Funny, I say similar about tobacco. That is, if a terrorist said, "I'm going to come to your country,and I'm going to sell an addictive carcinogen..." There would be protests in the streets demanding that terrorist be drone-strike'd to hell and then some.
As it is, the state and federal governments allow the product, *and* profit from it (via taxes). Talk about a page right out of an Orwellian novel.